MESON Chess Problem Database

Problem Display
PID: 64155 (6r1/1p2Nb2/pK1P3n/4pQ2/2kp3R/R1Bp3q/1P1nr3/5Nb1 w - - 0 1)

Ellerman, Arnoldo

2nd Prize=, Good Companions (May), 1916

6r1/1p2Nb2/pK1P3n/4pQ2/2kp3R/R1Bp3q/1P1nr3/5Nb1

#2

9 + 13

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Sxd2#
    • 1...Re3
      • 2.Sxd2#
    • 1...Re4
      • 2.Sxd2#
    • 1...Rg4
      • 2.Qc8#
    • 1...Sb3
      • 2.Ra4#
    • 1...Sg4
      • 2.Qxf7#
    • 1...e4
      • 2.Qc5#
  • Tries
    • 1.Rxd4+?
      • 1...exd4
        • 2.Qc5#
      • 1...Bxd4+!
    • 1.Qxf7+?
      • 1...Qe6
        • 2.Qxe6#
      • 1...Sxf7!
  • Keys
    • 1.Ba5!
      • threat
        • 2.Rc3#
      • 1...Qxh4
        • 2.Qxd3#
      • 1...Qg4
        • 2.Qxd3#
      • 1...Re4
        • 2.Sxd2#
      • 1...Rg4
        • 2.Qc8#
      • 1...Sb1
        • 2.b3#
      • 1...Sb3
        • 2.Ra4#
      • 1...Se4
        • 2.b3#
      • 1...Sg4
        • 2.Qxf7#
      • 1...e4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(c);N_GUARD::S(A),XS(b)
    • R(c);N_GUARD,N_SPINP(g)::S(A),XS(b)
    • R(m);N_GUARD,N_SPINP(g),S_CUTQ(e)::QAR(F)
    • S(b);SBLOCK::R(C)
    • S(j);N_GUARD,N_SPINP(g),S_CUTQ(e)::QAB(F),XB(l)
    • P(h);N_SPINP(g),OGATE::QAR1(F)
  • Tries
    • Try
      • R(E);CHECK,P_SPINR(E),XP(g)
      • Vars
        • P(h);OGATE,XR(E)::QAR1(F)
      • Refutation
        • B(a);CHECK,XR(E)
    • Try
      • Q(F);CHECK,XB(l)
      • Vars
        • Q(e);N_GUARD,P_PINP(H),P_SPINQ(e)::QAB(F),XQ(e)
      • Refutation
        • S(j);XQ(F)
  • Actual
    • B(D);
    • Threat
      • R1(C)
    • Vars
      • Q(e);N_GUARD,N_SPINP(g),XR(E)::QAB1(F),XP(d)
      • Q(e);N_GUARD,N_SPINP(g)::QAB1(F),XP(d)
      • R(c);N_GUARD,N_SPINP(g)::S(A),XS(b)
      • R(m);N_GUARD,N_SPINP(g),S_CUTQ(e)::QAR(F)
      • S(b);N_GUARD::P(B)
      • S(b);SBLOCK::R(C)
      • S(b);N_GUARD,N_SPINP(g)::P(B)
      • S(j);N_GUARD,N_SPINP(g),S_CUTQ(e)::QAB(F),XB(l)
      • P(h);N_SPINP(g),OGATE::QAR1(F)
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